Chemical Reaction Engineering A Catalyst Changes the equilibrium constant of the reaction Increases the equilibrium concentration of the product Shortens the time to reach the equilibrium None of these Changes the equilibrium constant of the reaction Increases the equilibrium concentration of the product Shortens the time to reach the equilibrium None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second) L√(K/D1) 1 ∞ 1/(L√(K/D1)) L√(K/D1) 1 ∞ 1/(L√(K/D1)) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering To maximise the formation of R in the simultaneous reactionA + B → R , rR = 2CA0.5.CB2 A + B → S , rS = 1.5 CA . CB We should have High CA, high CB Low CA, high CB Low CA, low CB High CA, low CB High CA, high CB Low CA, high CB Low CA, low CB High CA, low CB ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the Both A & B Neither A nor B Pressure Temperature Both A & B Neither A nor B Pressure Temperature ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A catalyst loses its activity due to All of these Loss in surface area of the active component Covering of the catalytic active sites by a foregin substance Agglomeration of metal particles caused by thermal sintering of the solid surface All of these Loss in surface area of the active component Covering of the catalytic active sites by a foregin substance Agglomeration of metal particles caused by thermal sintering of the solid surface ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to D1.5 D2 √d D D1.5 D2 √d D ANSWER DOWNLOAD EXAMIANS APP
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